To put this into its proper perspective, see table 7 here: https://www.ussc.gov/sites/default/files/pdf/research-and-pu... In 2022, the average murderer in the Federal Southern District of New York (N = 58) was sentenced to a median of 231 months, which comes out to 19 years and change. No crime of any type had an mean or median sentence higher than 25 years; most were far less than half. So it should be really hard…
It's impossible to knoe the number, but it's arguably non-zero.
He should have gotten the 40 years prosecution was asking.